Improvement in attachments for wood-working machinery



E. CONRAD. Attachment for Wood-Working Machinery.

No. 210,919. I Patented Dec. 17, 1878.

fill HiWlli NJ'ETERS. FKOTO-LITNOGRAPHEP, WASMNGTON, D C.

UNITED STATES PATEIN FIGE.

ELI CONRAD, OF MARYSVILLE, OHIO.

IMPROVEMENT IN ATTACHMENTS TOR WOOD-WORKING MACHINERY.

1878 application filed December 15, 1877.

To all whom it may concern:

Be it known that I, ELI CONRAD, of Marysville, in the county of Union and State of Ohio, have invented certain new and useful Improvements in Attachments for \T ood- Working Machinery; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being made to the accompanying drawing, forming a part of this specification, and in which-- Figure l is a top-plan view, and Fig. 2 is a longitudinal sectional view on the line a: :r,

"he object of my invention is to provide a carriage for feeding woodworkin g machinery where it is necessary to plow, groove, mold, or rabbet circles or parts of circles, such as in window and transom sashes, which has heretofore been imperfectly done by hand with ohisels, and at great expense; and to this end the invention consists in the combination and arrangement of parts, as will be hereinafter fully described, and pointed out in the claims.

In the drawing, A represents a table provided with a hole, a, through which the headblock, carrying bits for molding, plowing, or grooving, passes. B representsasccondtable, removably pivoted to one end of table A, and which is provided with a circular hole, 1), directly over hole a in table A. This table is adapted to be moved around on table A in the arc of a circle by means of a handle, 0, for a purpose hereinafter described, and is adapted to be secured in any desired position by the slotted curved plate a and set-screw 0, arranged at the opposite end from which said table is pivoted.

D represents a revolving circular wooden or iron plate, provided with a circular hole, d, and arranged to iit within the circular hole I) in table 13, said table being rabbeted out on its under side, so that the flange d of the plate D will be flush with the under side of said table when placed therein. E E represent two slot-ted cross-bars, secured upon opposite sides of the circular plate D by screws 6 e. F F represent adjustable guides, secured in the slots e e of the cross-bars by means of the setscrews f f. These guides are provided with ts Gr Gr, secured thereto by the slotted fitting over said guides, and the whereby said supports are and transversely adsuppor pieces g g, set-screws g 9, adapted to be vertically justable, if desired. Each support-is provided on its under side with a spring, H, for holding the material in place being operated upon, and also for accommodating irregularities in width or thickness of same.

Secured to the inner side of guide Fis a spring, H, which is adjusted by the set-screw h, passing through said guide, and by which the material to be operated upon is securely held in place, although allowed sufficieut yieldin g motion when required. The guide F is also provided at its lower end with the strip I, to prevent small sash from dropping down after passing inside of the cross-bars. The cross-bars are provided with a scale of inches and fraction of inches for accurately adjusting the guides.

Operation The sash to be molded or plowed is placed upon the cross'bars E E, and then forced under the guides and retained in place by the springs. The attachment is then placed upon the table A, and secured thereon by the slot ted curved plate and set-screw. Power then being applied, straight sides of sash may be worked by pushing the sash through the attachment until the bit approaches the circular part of the sash, when the attachment, with the sash, may be turned around in either direction until the whole is finished as desired. The attachment may be further moved or adjusted, to suit the necessities of the case, by means of the handle 0, attached to the table B.

I claim as my invention- 1. The combination, with the table A, pro vided with the hole a, of the table B, provided with the movable circular plate D, having hole (I, and mechanism connected therewith, substantially as described, for holding the article to be operated upon, substantially as and for the purpose specified.

2. The combination, with table A, having hole a, of the adjustable table B, provided with movable circular plate D, having hole 01, substantially as and for the purpose herein shown and described.

3. The combination, with the guides F F, movable plate D, of the slotted cross-bars E of the supports G G and springs H H, sub- E, adjustable guides F F, supports G G, stantially as and for the purpose herein shown springs H H, and adjustable spring H, suband described. stantially as and for the purpose herein shown 4. The combination of the adjustable guides and described. F F, adjustable supports G G, springs H H, ELI CONRAD. and adjustable spring H, substantially as and WVitnesses: for the purpose herein shown and described. SHoBAL P. MULFORD,

5. The combination, with the table 13 and CHRISTIAN M. GRAHAM. 

